linux-kernel - [patch V2 13/13] x86/softirq/64: Inline do_softirq_own

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Message-Id: <20210210002513.382806685@linutronix.de>
Date:   Wed, 10 Feb 2021 00:40:54 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Josh Poimboeuf <jpoimboe@...hat.com>,
        Helge Deller <deller@....de>,
        "David S. Miller" <davem@...emloft.net>,
        Michael Ellerman <mpe@...erman.id.au>,
        Rich Felker <dalias@...c.org>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Kees Cook <keescook@...omium.org>,
        Lai Jiangshan <jiangshanlai+lkml@...il.com>
Subject: [patch V2 13/13] x86/softirq/64: Inline do_softirq_own_stack()

From: Thomas Gleixner <tglx@...utronix.de>

There is no reason to have this as a seperate function for a single caller.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Kees Cook <keescook@...omium.org>
---
V2: Adopt to the new header file.
---
 arch/x86/include/asm/irq_stack.h     |    3 +--
 arch/x86/include/asm/softirq_stack.h |   11 +++++++++++
 arch/x86/kernel/irq_64.c             |    5 -----
 3 files changed, 12 insertions(+), 7 deletions(-)

--- a/arch/x86/include/asm/irq_stack.h
+++ b/arch/x86/include/asm/irq_stack.h
@@ -194,7 +194,7 @@
  * interrupts are pending to be processed. The interrupt stack cannot be in
  * use here.
  */
-#define run_softirq_on_irqstack()					\
+#define do_softirq_own_stack()						\
 {									\
 	__this_cpu_write(hardirq_stack_inuse, true);			\
 	call_on_irqstack(__do_softirq, ASM_CALL_SOFTIRQ);		\
@@ -202,7 +202,6 @@
 }
 
 #else /* CONFIG_X86_64 */
-
 /* System vector handlers always run on the stack they interrupted. */
 #define run_sysvec_on_irqstack_cond(func, regs)				\
 {									\
--- /dev/null
+++ b/arch/x86/include/asm/softirq_stack.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_SOFTIRQ_STACK_H
+#define _ASM_X86_SOFTIRQ_STACK_H
+
+#ifdef CONFIG_X86_64
+# include <asm/irq_stack.h>
+#else
+# include <asm-generic/softirq_stack.h>
+#endif
+
+#endif
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -74,8 +74,3 @@ int irq_init_percpu_irqstack(unsigned in
 		return 0;
 	return map_irq_stack(cpu);
 }
-
-void do_softirq_own_stack(void)
-{
-	run_softirq_on_irqstack();
-}